My very first full-time teaching job I had two supervisors who were experts at giving people the stink-eye. I mean, I began to wonder if they carried weapons, their stink-eyes were that bad.
Later on I began to wonder, "How in the hell do such horrible people get and keep jobs working with young children, and even get promoted?" (Around here, in education, they call that "failing up".)
It was one of those jobs where normal people working at normal schools will never comprehend how bad it was, not just for me but for many of the kids too. How could I have known that during the job interview? One of the admin's wasn't at the job interview and the other one was only showing her Sweet and Kind side - her fake self. Once I was hired I only saw that Sweet and Kind side of her very rarely, and certainly never directed at me, sub-human slug that I was in her eyes.